Anyways, you guys got me thinking. Could someone give me an overview of the major Canadian hardware sites? Like which ones of free shipping on major purchases, which ones should be avoided, etc... I.E. I heard newegg offers good deals but you have to pay through the teeth for shipping.

These are the sites I've been considering:
tigerdirect.ca
newegg.ca
ncix.com
directcanada.ca

Where are you located? Just cause directcanada and ncix are both located in BC and if you don't live in BC you don't pay PST. So that's 8% there.

I think NCIX is most popular around here, just cause you can price match and their customer service is pretty decent and they generally respond pretty quickly. If you wait for one of their gift card = free shipping you can save on shipping too. They just had one last week 10$ gift card = free shipping for entire order.

While the Antec 900 is a nice case (it's the one I use), I've recently become rather attatched to CoolerMaster cases. In particular, the CM 690. Somebody earlier suggested the HAF 932, but that's a full tower case, and way too big for what you're using. Even with crossfired cards, you'll be able to fit that into the CM 690 quite nicely. It's even a relatively cheap case, but you'll need to purchase additional fans to completely deck out your case. the 690 is a beast, definitely the case i'm using for my next build. :)

The Antec 900 is old in the tooth and imo, not worthy of any I7 build...particularly if your even thinking about SLI in the future, get a Case with more "breathing room"....as for GPU's, the GTX 275's seem like a great deal right now...pick up 2 of em and "hold on" for the ride...

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Introducing me n my OCD to Watercooling, is like taking an Alcoholic to an "all you can drink" Beach Bar in Mexico

Ncix is just amazing at the moment, really cheap shipping deals (gift card = whole order free shipping) compared to newegg, price-matching, and some really good deals atm (customer appreciation sale). The best thing about them is that they only charge GST if your outside of BC, compared to newegg and tiger direct which charges you the full tax, which makes a huge difference when making big orders. Tigerdirect would be my second choice because they have probably the best deals and really cheap shipping, just dont use them if your order is going to be huge.

1. Best bang for the buck: gtx 260 in dual SLI or 4890 in dual Xfire? If it's negligable, I'd prefer to go with the nVidia (slightly cheaper, too). I've heard the SLI drivers are more stable than Xfire. Am I wrong this?

2.I know the 932 is very big, but would going with it be a disadvantage in any ways aside from being ridiculously spacious? I like the way it looks, and it seems to have excellent airflow and room for upgrades.

P.S. I know I was the one who brought the 275s up, but I looked deeper into and they're too expensive at the moment. Or should I go with a single 275 and upgrade to SLi when they get cheaper?

GTX 260 SLI vs 4890 in Xfire is a bit of an unfair comparison. GTX 275's in sli vs the 2 4890s would be more appropriate. If you absolutely can't spend more, go with the cheapest option which would be the 260's in this case. If you can, I'd go for the 275's since you can also do some folding in your spare time.

nothing wrong with liking the 932, IMO, get a CM 960 instead and use the cash for the 275's

GTX 260 SLI vs 4890 in Xfire is a bit of an unfair comparison. GTX 275's in sli vs the 2 4890s would be more appropriate. If you absolutely can't spend more, go with the cheapest option which would be the 260's in this case. If you can, I'd go for the 275's since you can also do some folding in your spare time.

nothing wrong with liking the 932, IMO, get a CM 960 instead and use the cash for the 275's